Abstract：
:Replacement of N(2) by argon in the air around nodules directs nitrogenase electron flow in its total onto H(+) resulting in increased nodule H(2) evolution (total nitrogenase activity (TNA)). However, argon application induces a so-called argon-induced decline in nitrogenase activity (Ar-ID) connected with decreased nodule oxygen permeability. Consequently, TNA measurements tend to underestimate total nitrogenase activity. It is unclear whether the decline in oxygen diffusion into nodules induces the Ar-ID, or whether a decline in nitrogenase activity is followed by lower nodule O(2) uptake. The objective of the present work was to examine the time sequence of the decline in nodule H(2) evolution and O(2) uptake after argon application. In addition, the reliability of TNA values, taken as quickly as possible after the switch to Ar/O(2), was tested through comparative measurement of (15)N(2) uptake of the same plants. Short-term TNA measurements in an optimized gas exchange measurement system yielded reliable results, verified by parallel determination of (15)N(2) uptake. A five min application of Ar/O(2) was without effect on the subsequent H(2) evolution in ambient air. A parallel experiment on control plants revealed that a decrease in nodule oxygen uptake began several minutes after the onset of the decline in H(2) evolution. We conclude that the primary effect of the replacement of N(2) by argon differs from oxygen diffusion control. A gas exchange system allowing an immediate taking of TNA yields reliable results and does not disturb nodule activity. Gas exchange measurements provide a powerful tool for studying nodule physiology and should be combined with material from molecular studies.
journal_name
J Plant Physioljournal_title
Journal of plant physiologyauthors
Fischinger SA,Schulze Jdoi
10.1016/j.jplph.2010.03.014subject
Has Abstractpub_date
2010-09-01 00:00:00pages
1112-5issue
13eissn
0176-1617issn
1618-1328pii
S0176-1617(10)00210-5journal_volume
167pub_type
杂志文章abstract：:In our previous study we showed that volatile organic compounds (VOCs) from Alcaligenes faecalis JBCS1294 (JBCS1294) induced tolerance to salt stress in Arabidopsis thaliana by influencing the auxin and gibberellin pathways and upregulating the expression of key ion transporters. The aim of this study was to evaluate ...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1016/j.jplph.2017.04.002
更新日期：2017-07-01 00:00:00
abstract：:The efficacy of calcium sprays for improving fleshy fruit resistance to abiotic/biotic stress and enhancement of fruit shelf life has increasingly been explored. However, because calcium is a powerful secondary messenger in many signaling pathways, including those driven by abscisic acid (ABA) and jasmonates, it may i...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1016/j.jplph.2018.08.011
更新日期：2018-12-01 00:00:00
abstract：:A sand culture experiment was conducted to answer the question whether or not exogenous KNO(3) can alleviate adverse effects of salt stress in winter wheat by monitoring plant growth, K(+)/Na(+) accumulation and the activity of some antioxidant enzymes. Seeds of two wheat cultivars (CVs), DK961 (salt-tolerant) and JN1...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1016/j.jplph.2008.01.001
更新日期：2008-09-29 00:00:00
abstract：:The flavor and taste of fruits are often determined by terpenes. We identified three cDNAs encoding putative terpene synthases from olive fruits of cv. Frantoio and Grignano. Heterologous expression in a bacterial system demonstrated that one of the terpene synthases, OeGES1, was an active monoterpene synthase that co...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1016/j.jplph.2012.01.021
更新日期：2012-06-15 00:00:00
abstract：:Both H(2)O(2) and NO are involved in multiple physiological responses in plants. Metallothionein (MT) can bind heavy metal ions and reduce metal toxicity. Copper toxicity has become a major problem with increasing agricultural and environmental pollution. Here, we investigated the possible roles of ROS, NO and metallo...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1016/j.jplph.2010.04.007
更新日期：2010-10-15 00:00:00
abstract：:Most of the studies carried out on Fe deficiency condition in arboreous plants have been performed, with the exception of those carried out on plants grown in the field, in hydroponic culture utilizing a total iron depletion growth condition. This can cause great stress to plants. By introducing Fe deficiency induced ...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1016/j.jplph.2009.01.007
更新日期：2009-07-15 00:00:00
abstract：:Triacylglycerols (TAGs) are the most important energy storage form in oilseed crops. Diacylglycerol acyltransferase (DGAT) catalyzes the rate-limiting step of the Kennedy pathway of TAG biosynthesis. To date, little is known about the regulation of DGAT activity in peanut (Arachis hypogaea), an agronomically important...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1016/j.jplph.2017.09.009
更新日期：2017-12-01 00:00:00
abstract：:The Basidiomycete fungus Ustilago maydis is the common agent of corn smut and is capable of inducing gall growth on infected tissue of the C4 plant maize (Zea mays). While U. maydis is very well characterized on the genetic level, the physiological changes in the host plant in response to U. maydis infection have not ...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1016/j.jplph.2007.05.008
更新日期：2008-01-01 00:00:00
abstract：:Rice is the staple food for more than fifty percent of the world's population, and is therefore an important crop. However, its production is hindered by several biotic and abiotic stresses. Although rice is the only crop that can germinate even in the complete absence of oxygen (i.e. anoxia), flooding (low oxygen) is...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1016/j.jplph.2011.07.009
更新日期：2011-12-15 00:00:00
abstract：:Hydroxyproline-rich glycoproteins (HRGPs) are plant cell wall proteins related to plant growth and development, and extensins (EXTs) are a subfamily of HRGPs. In this study, the function of HRGPs, especially EXTs, was investigated in the pollen tube and style cell growth of Nicotiana tabacum L. By using the techniques...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1016/j.jplph.2014.02.010
更新日期：2014-07-15 00:00:00
abstract：:The morphological features of stomata including their size and density could be modulated by environmental cues; however, the underlying mechanisms remain largely elusive. Here, the effect of different irrigation and phosphorus (P) regimes on stomatal size (SS) and stomatal density (SD) of potato leaves was investigat...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1016/j.jplph.2014.06.002
更新日期：2014-09-01 00:00:00
abstract：:In sterile cultivated protonema of the moss Funaria hygrometrica we found a promotion of ethylene formation by ACC but not by other possible precursors such as 2-ketoglutarate or glutamate. The ACC contents and ethylene formation during development of protonema were correlated. Both ACC contents and ethylene formation...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1016/S0176-1617(85)80069-9
更新日期：1985-01-01 00:00:00
abstract：:The present study was designed to determine the interactive effect of exogenous melatonin and nitric oxide (NO) on sodic alkaline stress mitigation in tomato seedlings. It was observed that exogenous melatonin treatment elevated NO levels in alkaline-stressed tomato roots. However, exogenous NO had little effects on m...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1016/j.jplph.2015.07.012
更新日期：2015-08-15 00:00:00
abstract：:Although it is well known that parasitic weeds such as Orobanche (broomrape) significantly reduce the yield of economically important crops, their infection-induced oxidative changes need more exploration in their host plants. Moreover, applying an eco-friendly approach to minimize the infection is not yet available. ...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1016/j.jplph.2020.153184
更新日期：2020-07-01 00:00:00
abstract：:A non-destructive nitrogen (N) detector [Agriexpert PPW-3000 (PPW-3000)] is a useful device for rapid and non-destructive measurement of leaf N content. However, some studies find a poor correlation between the PPW-3000 reading and the actual leaf N content; the R2 value of the approximate equation was low. To improve...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1016/j.jplph.2005.09.004
更新日期：2006-04-01 00:00:00
abstract：:The microinjection of fluorescent probes into live cells is an essential component in the toolbox of modern cell biology. Microinjection techniques include the penetration of the plasma membrane and, if present, the cell wall with micropipettes, and the application of pressure or electrical currents to drive the micro...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1016/j.jplph.2019.153060
更新日期：2020-01-01 00:00:00
abstract：:To explore what role chloroplast positioning might have in relation to latitudinal variation in mesophyll conductance (gm) of Populus trichocarpa Torr. & Gray (black cottonwood), we examined photosynthetic response to different blue light treatments in six representative genotypes (three northern and three southern). ...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1016/j.jplph.2017.03.006
更新日期：2017-06-01 00:00:00
abstract：:Changes in plasma membrane lipids, such as sterols and fatty acids, have been observed as a result of salt stress. These alterations, together with modification of the plasma membrane protein profile, confer changes in the physical properties of the membrane to be taken into account for biotechnological uses. In our e...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1016/j.jplph.2014.12.003
更新日期：2015-03-01 00:00:00
abstract：:The carotenoid content in photosynthetic plant tissue reflects a steady state value resulting from permanent biosynthesis and concurrent photo-oxidation. The contributions of both reactions were determined in illuminated pepper leaves. The amount of carotenoids provided by biosynthesis were quantified by the accumulat...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1078/0176-1617-00871
更新日期：2003-05-01 00:00:00
abstract：:Arbuscular mycorrhizal fungi enhance CO₂ assimilation of their hosts which ensure the demand for carbohydrates of these obligate biotrophic microorganisms. Photosynthetic parameters were measured in tomato colonised or not by the arbuscular mycorrhizal fungus Glomus mosseae. In addition, carbohydrate contents and mRNA...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1016/j.jplph.2011.01.026
更新日期：2011-07-15 00:00:00
abstract：:To study the mechanisms of drought inhibiting photosynthesis and the role of PAs and ethylene, the photosynthetic rate (Pn), the maximal photochemical efficiency of PSII (Fv/Fm), the intercellular CO2 concentration (Ci), photorespiratory rate (Pr), the amount of chlorophyll (chl), antioxidant enzyme activity, ethylene...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1016/j.jplph.2014.06.007
更新日期：2014-09-15 00:00:00
abstract：:Euglena gracilis, a unicellular photosynthetic flagellate, uses light and gravity as environmental hints to reach and stay in regions optimal for growth and reproduction. The current model of gravitaxis (the orientation with respect to the earth's gravitational field) is based on the specific density difference betwee...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1078/0176-1617-00194
更新日期：2001-01-01 00:00:00
abstract：:Potassium is the most abundant macronutrient, which is involved in a multitude of physiological processes. Potassium uptake in roots is crucial for plants; however, K(+) efflux can also occur and has important functions. Potassium efflux from roots is mainly induced by stresses, such as pathogens, salinity, freezing, ...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1016/j.jplph.2014.01.015
更新日期：2014-05-15 00:00:00
abstract：:Two isoforms of NDPKs (diphosphonucleoside kinases: E.C. 2.7.4.6.) named S-NDPK-A and S-NDPK-B were separated and purified from shoots of Alyssum murale (19th day of growth), a nickel accumulator plant, by a four-step procedure involving ammonium sulphate precipitation and DEAE-sepharose and hydroxyapatite column chro...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1016/j.jplph.2010.01.016
更新日期：2010-06-15 00:00:00
abstract：:The toxicity and effects on protein synthesis of the phthalate esters diethyl phthalate (DEP) and di(2-ethylhexyl) phthalate (DEHP) was studied in radish seedings (Raphanus sativus cv. Kööpenhaminan tori). Phthalate esters are a class of commercially important compounds used mainly as plasticizers in high molecular-we...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1078/0176-1617-00525
更新日期：2003-09-01 00:00:00
abstract：:In tomato (Solanum lycopersicum Mill.), auxin is believed to play a pivotal role in controlling fruit-set and early ovary growth. In this paper we investigated the effect of the reduced auxin sensitivity exhibited by the diageotropica (dgt) tomato mutant on ovary growth during early stage of fruit development. Here we...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1016/j.jplph.2012.04.005
更新日期：2012-08-15 00:00:00
abstract：:The interactive effects of salinity and potassium deficiency on the growth, mineral elements and photosynthetic performance were investigated in wild (Hordeum maritimum L.) and cultivated barley (Hordeum vulgare L. var. Manel). At 28 d of growth, plants were treated with 3 mM K and 0 mM NaCl (3-0); 3 mM K and 100 mM N...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1016/j.jplph.2009.06.013
更新日期：2009-12-15 00:00:00
abstract：:Ion-selective microelectrodes are a powerful tool in studying adaptive responses of plant cells and tissues to various abiotic stresses. However, application of this technique in Na(+) flux measurements was limited due to poor selectivity for Na(+) ions of commercially available Na(+) cocktails. Often, these cocktails...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1016/j.jplph.2010.12.006
更新日期：2011-07-01 00:00:00
abstract：:Fusarium oxysporum f. sp. melonis is a highly specialized fungus that attacks the root system of melon (Cucumis melo L.). In this work the presence of a class III chitinase was examined by immunological techniques in the root and stem base of a susceptible (cv. Galia) and a resistant (cv. Bredor) melon during the infe...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1016/j.jplph.2005.02.004
更新日期：2006-01-01 00:00:00
abstract：:Total phenolics and the profile of phenolic acids and flavonoids were investigated in the roots and leaves of Ulmus laevis cultured on the medium with inorganic and organic arsenic - As(III), As(V) and DMA(V) at 0.06mM and their equimolar combinations. Further, the accumulation of salicylic acid (free and glucoside-bo...
journal_title：Journal of plant physiology
pub_type： 杂志文章
doi：10.1016/j.jplph.2017.09.013
更新日期：2018-01-01 00:00:00
